Morgana and Arthur Time Travel Fic
I need help finding a specific fic where Morgana sends Arthur and (unintentionally) herself back in time to the height of the purge. She panics when she sees Uther and teleports Arthur and herself to a forest. They meet next morning they meet a child version of Merlin who claims he could send them back. There’s a part where Merlin uses magic in the forest but he is naively under the impression that any magic preformed in the forest doesn’t count even if seen. They go back to Elador with Merlin and eventually Merlin is allowed to send them back.
Also in the present time, Arthur restrained Merlin's magic after finding out about it, releasing him after they get back.
I don't remember what platform this was on.